National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Mostly Cloudy

78°F

26°C

Humidity 87%
Wind Speed S 8 mph
Barometer 30.16 in (1019.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 16 Aug 6:51 am CDT
Extended Forecast for

San Antonio International Airport TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. South wind around 5 mph.
Tonight
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 100. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 100. South wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 101. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 78.
Friday
Mostly sunny and hot, with a high near 101.
Friday Night
Mostly clear, with a low around 78.
Saturday
Mostly sunny and hot, with a high near 101.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.53°N 98.48°W (Elev. 817 ft)
Last Update:
6:46 am CDT Aug 16, 2026
Forecast Valid:
7am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation